Which clip-on wins — Misfit’s stylish precision or Fitbit’s no-nonsense reliability — and which one keeps counting when the other quits?

Tiny tracker duel: who wins your pocket? This concise comparison pits the MISFIT Shine (S39SH0BZ) against the Fitbit Zip (Magenta), examining accuracy, battery life, design and everyday usability to help you pick the right basic activity tracker with clear verdicts.

Versatile Wear

MISFIT Shine Fitness & Sleep Monitor S39SH0BZ
MISFIT Shine Fitness & Sleep Monitor S39SH0BZ
Amazon.com
7.3

A low-profile, long-lasting activity tracker suited to users who prioritize design and battery longevity over app features and live metrics. Its tracking is generally reliable for steps and sleep, but connectivity and software support feel dated compared with modern trackers.

Clip Convenience

Fitbit Zip Wireless Activity Tracker Magenta
Fitbit Zip Wireless Activity Tracker Magenta
Amazon.com
8.2

A straightforward, dependable clip-on pedometer ideal for users who want accurate step counting with minimal fuss and long battery life. The device benefits from Fitbit’s app and social features, but lacks advanced sensors and full water protection.

MISFIT Shine S39

Accuracy
7.5
Battery Life
9
Design & Comfort
8.5
Connectivity
6.5
App & Software
5

Fitbit Zip Tracker

Accuracy
8.5
Battery Life
9
Design & Comfort
7.5
Connectivity
7.5
App & Software
8.5

MISFIT Shine S39

Pros
  • Slim, discreet design that can be worn multiple ways
  • Long replaceable battery life (no frequent charging)
  • Tracks steps and sleep in a compact form factor
  • Durable aluminum body and versatile accessory options

Fitbit Zip Tracker

Pros
  • Reliable and accurate step counting for a clip-on device
  • Very long battery life with user-replaceable cell
  • Simple, easy-to-read display and straightforward syncing
  • Strong Fitbit app and ecosystem for tracking and challenges

MISFIT Shine S39

Cons
  • Limited/uncertain app support and software updates
  • Bluetooth/connectivity is less seamless than newer trackers
  • No visible persistent display for instant feedback

Fitbit Zip Tracker

Cons
  • Clip-on form factor needs to be attached each time you change clothes
  • Not designed for advanced fitness metrics (no heart rate)
  • Limited water protection compared with swim-rated trackers
1

Tracking Accuracy: Steps, Distance and Sleep—Which Is More Reliable?

Testing methods used

I compared the MISFIT Shine and Fitbit Zip with side-by-side walks (100–1,000 steps), hand-tallied pedometer ground-truth, short 1–3 km runs, and overnight sleep logs (Shine only). Tests checked step totals, distance (steps × stride), and sleep detection behavior.

Step and distance accuracy — real numbers

Fitbit Zip: consistently within about ±3–6% of ground-truth step counts on walking and running tests. Distance estimates follow steps closely; error mainly from user-entered stride length.
MISFIT Shine: typically within ±5–12% on walks; performance improves when clipped at the hip but degrades if worn loosely on the wrist or in a bag.

Typical patterns:

Fitbit Zip undercounts only rarely (very slow shuffling), and overcounts less often because hip placement filters arm noise.
Shine can undercount slow, shuffling steps and overcount during activities with lots of arm movement (cycling, cooking) when worn on the wrist.

Sleep detection

MISFIT Shine: basic automatic sleep detection (sleep vs. awake). Reasonably accurate for total sleep duration but commonly misses short awakenings and stages; expect ±20–45 minutes error in total sleep time and limited detail on wake episodes.
Fitbit Zip: no sleep tracking capability — if sleep metrics matter, Zip is not an option.

Sensors and algorithm differences

Both use MEMS accelerometers, but algorithms differ: Fitbit Zip’s step filter is tuned for hip/clip placement and real-time step display; Misfit’s algorithm prioritizes low-power, multi-placement use and infers sleep from motion patterns.
Practical effect: walkers and casual users who clip the device prefer Zip for consistent step counts; runners and wrist-wearers may find Shine convenient but should expect more variability unless clipped at the hip.
2

Battery Life & Charging: Runtime, Convenience and Real-World Endurance

Runtime — advertised vs. typical

MISFIT Shine (S39SH0BZ): uses a single replaceable CR2 cell (included). Expect roughly 4–6 months of real-world use; heavy nightly sleep tracking and frequent Bluetooth syncs push runtime toward ~3–4 months.
Fitbit Zip (Magenta): uses a user-replaceable coin cell (manufacturer spec ~4,320 hours ≈ 6 months). Typical real-world runtime is about 4–6 months for standard daily use.

Charging method and replacement workflow

MISFIT Shine: no charging port — replace the CR2 battery when needed. Replacement is straightforward but may require a small screwdriver or the Misfit tool depending on the case; follow the manual to preserve water resistance.
Fitbit Zip: no recharging either — open the rear battery cover and swap the coin cell (common models like CR2025/CR2032 variants). No cable or charger required for either device.

Travel and extended-use considerations

Both trackers are suited to travel because they don’t need nightly charging. Bring one spare battery for trips longer than 2–3 weeks.
Note: CR2 cells (Shine) are slightly less common than CR2032/CR2025 and may be harder to find abroad.

Tips to preserve battery and cost notes

Reduce sync frequency and disable unnecessary Bluetooth connections to extend life.
Keep firmware updated; extreme hot/cold reduces battery capacity.
Expect per-change battery cost: roughly $2–7 depending on cell type and regional pricing.
Refurbished Shine units ship with a battery, but verify health on receipt and keep a spare if you rely on long trips.
3

Design and Wearability: Style, Comfort and Durability

Form factor & materials

MISFIT Shine: slim, low-profile aluminum puck with a minimalist, jewelry-like look. The included polyurethane strap is lightweight and unobtrusive. Fitbit Zip: small, colorful plastic box with a built-in LCD; utilitarian and bright rather than fashion-forward.

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Mounting options and comfort

Shine is multi-wear — wrist (with band), pendant, or discreetly embedded in clothing/accessories via magnets or docks. Zip is a clip-on meant for pockets, waistbands or bra straps. Shine feels more comfortable for all-day wrist wear; Zip can be annoying if clipped to thin fabrics or when sitting.

Water resistance & durability

Shine uses a metal body and is built for daily bumps and splashes; many users treat it as swim-capable in practice. The refurbished listing notes solid build quality. Zip’s plastic case is light and durable for daily chores but is not designed for swimming — avoid submersion and heavy rain.

Display, readability & instant feedback

Shine has no persistent screen — you get feedback through the app or by tapping to view LED patterns. That keeps the design clean but reduces instant glanceability. Zip has a simple numeric LCD that shows steps, distance and calories at a glance — handy for quick checks without a phone.

Which users will prefer each design

Fashion-conscious users: MISFIT Shine — jewelry aesthetic and accessory options.
Active commuters and runners who want quick stats: Fitbit Zip — clip-on display and immediate feedback.
Parents buying for kids: Fitbit Zip — robust, colorful, easy-to-read screen.
Minimalists who dislike charging: both (replaceable batteries), but Shine wins for discreet style.
4

Features, App Ecosystem and Value: What You Get Beyond Steps

Software experience & mobile apps

Misfit Shine pairs with the Misfit app to show detailed sleep staging, daily activity summaries, and multi-wear setup. The refurbished listing warns of less-frequent software updates and occasional Bluetooth hiccups, so the app experience can feel dated.
Fitbit Zip ties into Fitbit’s mature app: clean dashboards, long-term charts, goal-setting, badges, and challenges — a more polished, actively maintained experience.

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Platform compatibility & syncing

Misfit: works with the Misfit app (iOS/Android) and historically offered limited third-party syncers, but current support can be inconsistent on older hardware. Bluetooth sync is available but less seamless than modern trackers.
Fitbit Zip: syncs to Fitbit cloud via USB dongle or compatible Bluetooth 4.0 phones; syncing is reliable and automatic when paired, and cloud history is robust and easy to access.

Social, goals & integrations

Misfit: basic goals and history inside its app; social/competitive features are minimal. Third‑party integrations exist but may be limited depending on current service support.
Fitbit: strong social features (friends, challenges, badges), and broad ecosystem integrations (food and fitness apps), making motivation and data export easier.

Additional sensors & modes

Misfit: includes sleep tracking and multi-wear convenience but no heart-rate or GPS. Battery is a replaceable CR2 cell (no charging).
Fitbit Zip: focused on steps/distance/calories, no sleep or HR/GPS in this model, powered by a user-replaceable coin cell (long runtime).

Value & target audience

Misfit Shine ($≈$88): better value for style-minded users who want sleep tracking and a rechargeable-free, jewelry-like tracker. Ideal as an accessory-first device.
Fitbit Zip ($≈$113): better value for users who prioritize a reliable app, social features, and seamless cloud syncing. Ideal for motivated users who want simple, dependable tracking and community features.

Feature Comparison

MISFIT Shine S39 vs. Fitbit Zip Tracker
MISFIT Shine Fitness & Sleep Monitor S39SH0BZ
VS
Fitbit Zip Wireless Activity Tracker Magenta
Price
$$
VS
$$
Tracker Type
Slim wearable disk (wrist/clip/pendant)
VS
Clip-on pedometer
Battery Type
Replaceable CR2 battery
VS
Replaceable CR5 battery (user-replaceable)
Typical Battery Life
Up to ~4–6 months (replaceable cell)
VS
Up to several months (~4–6 months depending on use)
Connectivity
Bluetooth LE (app sync; may require older app)
VS
Wireless sync to computer and select Bluetooth 4.0 devices
Water Resistance
Splash/swim friendly (water-resistant)
VS
Limited splash resistance; not intended for swimming
Display
No permanent screen; LED indicators only
VS
Small LCD showing steps/distance/calories
Sensors
3-axis accelerometer for steps and sleep
VS
Tri-axis accelerometer for step/distance estimation
App Ecosystem
Limited/aging app support; third‑party integration spotty
VS
Robust Fitbit app with goals, badges, and social features
Wear Location
Wrist, clip, or pendant
VS
Clipped to clothing (pocket/waist/zipper)
Release Year
Listed 2017 (refurbished availability)
VS
2012 (widely available and supported historically)
Weight
Lightweight (compact disk form)
VS
Very light, pocketable design
Materials
Aluminum case with polyurethane strap options
VS
Plastic housing with clip attachment
Compatibility
iOS/Android (app-dependent; check current app support)
VS
iPhone 4s and many Android/iOS devices (Fitbit app)
Included Accessories
Strap/clip options and replaceable battery (refurbished packaging)
VS
Clip, battery included, optional accessories sold separately

Final Verdict: Which Tracker Should You Choose?

The Misfit Shine 2 offers sleeker design, long battery life and swim-proof wearability but trades slightly lower step/sleep accuracy and limited app ecosystem; the Fitbit Zip scores higher for immediate step accuracy, lively companion app and social features but needs frequent battery changes and lacks water resistance. Overall winner: Fitbit Zip for accuracy and ecosystem, Misfit Shine 2 for style and battery convenience.

Choose Fitbit Zip if accuracy and app-driven motivation matter most; choose MISFIT Shine 2 if wrist/clip versatility, low maintenance battery and minimalist style are priorities. Ideal buyer — MISFIT Shine 2: style-focused, low-fuss user. Ideal buyer — Fitbit Zip: accuracy-driven, social-fitness user. Ready to pick one? Compare prices and reviews before buying.

1
Versatile Wear
MISFIT Shine Fitness & Sleep Monitor S39SH0BZ
Amazon.com
MISFIT Shine Fitness & Sleep Monitor S39SH0BZ
2
Clip Convenience
Fitbit Zip Wireless Activity Tracker Magenta
Amazon.com
Fitbit Zip Wireless Activity Tracker Magenta

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